Compressed-air-valve diaphragm



I. STOKKE.

COMPRESSED-AIR VALVE DIAPHRAGM. APPucATloN msn MAY 1. :911.

IH l

Patented sept. 21,1920.

Unire rrr.

IVER STKKE, 0F SIOUX FALLS, SOUTH :DAKOTA To all whom t may concern.'

Be it known that l', vnn' Sroiirn, a citizen of the United States, resident of Sioux Falls, iii the county of lvilinneh'aha'Y and State of South Dakota, have invented a new and useful Compressed-Air-Valve Diaphragm to' be UsedV in Connection With Thermostatic Temperature Control, of which the following is a specification.

This invention relates -to certain new and usefui improvements in heat 'regulators and primarily to an improved compressed air, valve-controlling device for vopening and closing the valve which controls the admission of the heating fluid to a radiator, said device to beemployed in connection with a thermostatic temperature control by'wh-ich the' temperature of a room may be kept uniform in an automatic manner.

The principal object of this invention is to provide lan improved valve control which will be eiiicient in operation, very sensitive to the change of temperature, and yieldable and resilient connection between-the valve stem and the diaphragm or piston ofthe control device, said piston being reversible to vary the size of the compressed air chamber within'the device and thereby increase its field of utility and adaptability.

Further, the invention resides in the features of construction and the Varrangements and combinations of parts hereinafter described and claimed, reference being had to the accompanying drawing wherein Figure 1 is a side elevation of the improved device;

F ig. 2 is a sectional view thereof with the pipe connection for the usual thermostatic temperature control.

Referring more in detail to the drawings with like characters of reference for corresponding parts throughout the several views, the casing or cylinder 1i Vis cupshaped, providing an air, chamber 2 inY which the reversible piston 3 is slidably mounted. The opened lower end of the casing is counterbored to form an internal seat 4 for packing 5 about the piston or diaphragm member S, said packing being retained and compressed on its seat by an upwardly projecting annular extension 6 on the spider formed housing or covering 7 for the lower opened end of the inverted cup-shaped casing. Said casing and housing are detachably clamped together by Specification of Letters Patent. Patent-,ed Sgpgrl, 1920; Application filed May-7, i917.' seriaiiip.167,111,r v

vscrews 8 that are passed through theV pe-y ripheral iianges 9 and 1() formed .on said parts.U o ,Y Y

The closed upper end-wall of the casing is provided. with a small` port 11 A through which communication with chamber 2 may be obtained. A pipe section 12 lis threaded in the boss about said port and this SeC-` tion is connected. tothe usual thermostatic. temperaturel control (not shown) l bypipe section lll'and elbow 15 in which latteris Az irranged a strainer 16 for preventingvthe passage of'all impurities that might inter f vfere with the'eiiicient operation Vofthe de-f vice. This strainer is preferably a piece of cotton whichisy retained within' the elbow by the perforated disks 17. i e Y vThe spider 7 is formed with a central col-Y lar v18 which actsasa guide forthefstem 19 of the radiator'valve not shown. A -coiled springy 20 is interposed betweenv the valve stem 19 and the piston 3, seating at its lower end on the upper end of saidstem and finding a bearing at its opposite end in sockets 21 or on the end wall of the axial projection or boss 23.

valve either opened or closed against the action of the piston 3, this may be accomplished by binding a set screw against valve stem 19 to holdit fixed, said set screw being threaded radially through holev211 in the` collar 18. i

In practice, as the air pressure, admitted into chamber 2 by the thermostatic temperature control (not shown), strikes the upper surface of the piston and forces it down, it forces the coiled spring together, or contracts the same, and as the air pressure releases, the coiled spring extending will` force the piston upwardly,thus opening and closing the valve to which it is attached,

The piston may be reversed to vary the size of the chamber 2, as well as to accommodate for different lengths of springs, in which connection it will be noted .that the skirt 25 of the piston is sufficiently long to operate within the cylinder in either disposi# tion of said piston.

VThe coiled spring 20 between the piston desirable and essential in the pneumatic type of valve control since the piston may coniio '2 Y Y Y 1,353,290

tinue to move even though the valve be seated. Consequently, the valve is never jammed on its seat norv otherwise injured and rendered ineficent.

W'hat is claimed is l. A fluid operated valve control comprising an inverted cup-shaped casing having a fluid passage leading through its closed top. and being counterbored about its open lower end to form an annular seat, packing dis-V posed on the seat, a clamp ring drawn onto the packing and provided with a cylindrical extension internally flared in a downward direction and suspending a guide member therefrom byconnecting arms, a valve stem Y slidablethrough the guide member, a piston operable inthe casing and over the packing and formed with a skirt depending about the valve stem, and a spring housed within the piston skirtv and seating at one end on the piston and at its opposite end on the valve stem.

2. vA fluid operated valve controlcomprising an inverted cup-shaped casing having a fluid passage leading through its closed top and being' counterbored about its open lower end toform an annular seat, packingvdisposed on the seat, a clamp rngdrawn onto the packing and provided with a cylindrical extension internally liared in a downward direction and suspending av guideV member therefrom by connecting arms, a valve stem slidabl'e through the guide member, means carried by the guide member for locking the the easing ever the piston and frmed with( aniopening through which thevalve stein is 'eud'edi and a Qoiled Spring nterpesed' be-Y tween thev piston, and Valve stem vand housed' by the piston, When in one positioinjand @X-y posed, when reversed.

4. A fluid operated valve control compris-` a Casina a reversible Cup-Shaped piston. Sldable therein. and provided in the. .eppo- Ste sides of the bottom; of Said Cup-shaped. Pisten with bearings` and resilient means engaging in the. outer bearing, for eennetiea at. itseppest@ end. t0 the'stem Qff valve IVER AS.TOKKIFL 

